The Sign of One is one of the many factions in Planescape: Torment.
The Signers are a solipsistic bunch, with each member believing that they are the center of the multiverse. They believe that they shape their surroundings through sheer willpower, and that the multiverse is built upon belief and perspective. They view debate as a fine art.
Because of the strange and differed beliefs of the members, the faction is rather polarizing. There are a few main sub-groups of the faction that hold slightly different views. Some members believe they should use their willpower to make the multiverse a better place, while some aim for a larger goal: resurrecting a dead god.
The Will of One, one such sub-group, hopes to bring back Aoskar.